Irregular or French Curve

Description
This flat wooden drawing instrument has curves on the outside and in an inner opening.
The previous owner of the device collected more than twelve hundred hand and machine tools, displaying them at his family's building company in Baltimore, Md. This object came in a tool chest along with several others. Compare 1977.1101.0096.
This curve resembles one shown in Wallis. Hence the very rough date assigned.
References:
Roland S. Wallis, Industrial Education Notes on Mechanical Drawing, Ames, Iowa: Engineering Extension Department Iowa State College, 1922, p. 15.
Accession File.
Location
Currently not on view
date made
ca 1920
Physical Description
wood (overall material)
Measurements
overall: .3 cm x 20.9 cm x 7.3 cm; 1/8 in x 8 7/32 in x 2 7/8 in
ID Number
1977.1101.0095
accession number
1977.1101
catalog number
1977.1101.0095
Credit Line
The John R. Gerwig, Jr., Collection
subject
Mathematics
Drawing Instruments
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Curves
Data Source
National Museum of American History, Kenneth E. Behring Center

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